Beam control and matching for the transport of intense beams

✍ Scribed by H. Li; S. Bernal; T. Godlove; Y. Huo; R.A. Kishek; I. Haber; B. Quinn; M. Walter; Y. Zou; M. Reiser; P.G. O’Shea

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 310 KB
• Volume: 544
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2005.01.262

✦ Synopsis

The transport of intense beams for heavy-ion inertial fusion demands tight control of beam characteristics from the source to the target. The University of Maryland Electron Ring (UMER), which uses a low-energy (10 keV), highcurrent electron beam to model the transport physics of a future recirculator driver, employs real-time beam characterization and control in order to optimize beam quality throughout the strong focusing lattice. We describe the main components and operation of the diagnostics/control system in UMER. It employs phosphor screens, real-time image analysis, quadrupole scans and electronic skew correctors. The procedure is not only indispensable for optimum transport over a long distance, but also provides important insights into the beam physics involved. We discuss control/ optimization issues related to beam steering, quadrupole rotation errors and rms envelope matching.